Analysis of the condition: Scar hyperplasia can generally appear in the postoperative recovery period. Scar hyperplasia, also known as keloid, is caused by excessive proliferation of fibrous connective tissue. The skin surface of keloid is tumor-like hyperplasia, with smooth surface, ruddy and shiny color, and dilated capillaries are often seen. Skin damage extends outward from the edge and the crab's feet are deformed. Skin lesions vary in size, shape and hardness, such as cartilaginous, and the symptoms are mostly itching or pain or burning. Comments and suggestions: As the synthesis and metabolism of collagen continue to be abnormal, exceeding the rate of catabolism, collagen fibers will be formed for a long time. Teenagers are in adolescence, with vigorous tissue growth, strong immune response after trauma and high skin tension, and are prone to scar hyperplasia. There is no specific time limit, so it is better to pay more attention. If people with scar constitution take surgical resection treatment, it will stimulate fibroblasts, thus making scars multiply repeatedly. Therefore, if they have scar constitution, surgical resection should be strictly prohibited.